1. Long-Term Exposure to Ambient Air Pollution and Mortality among Four Million COVID-19 Cases in Italy: The EpiCovAir Study
- Author
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Stafoggia, Massimo, Ranzi, Andrea, Ancona, Carla, Bauleo, Lisa, Bella, Antonino, Cattani, Giorgio, Nobile, Federica, Pezzotti, Patrizio, and Iavarone, Ivano
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Mortality -- Risk factors -- Environmental aspects ,Air pollution -- Health aspects ,Environmental issues ,Health - Abstract
Background: The role of chronic exposure to ambient air pollutants in increasing COVID-19 fatality is still unclear. Objectives: The study aimed to investigate the association between long-term exposure to air pollutants and mortality among 4 million COVID-19 cases in Italy. Methods: We obtained individual records of all COVID-19 cases identified in Italy from February 2020 to June 2021. We assigned 2016-2019 mean concentrations of particulate matter (PM) with aerodynamic diameter [less than or equal to] 10 [micro]m (P[M.sub.10]), PM with aerodynamic diameter [less than or equal to]2.5 [micro]m (P[M.sub.2.5]), and nitrogen dioxide (N[O.sub.2]) to each municipality (n = 7,800) as estimates of chronic exposures. We applied a principal component analysis (PCA) and a generalized propensity score (GPS) approach to an extensive list of area-level covariates to account for major determinants of the spatial distribution of COVID-19 case-fatality rates. Then, we applied generalized negative binomial models matched on GPS, age, sex, province, and month. As additional analyses, we fit separate models by pandemic periods, age, and sex; we quantified the numbers of COVID-19 deaths attributable to exceedances in annual air pollutant concentrations above predefined thresholds; and we explored associations between air pollution and alternative outcomes of COVID-19 severity, namely hospitalizations or accesses to intensive care units. Results: We analyzed 3,995,202 COVID-19 cases, which generated 124,346 deaths. Overall, case-fatality rates increased by 0.7% [95% confidence interval (CI): 0.5%, 0.9%], 0.3% (95% CI: 0.2%, 0.5%), and 0.6% (95% CI: 0.5%, 0.8%) per 1 [micro]g/[m.sup.3] increment in P[M.sub.2.5], P[M.sub.10], and N[O.sub.2], respectively. Associations were higher among elderly subjects and during the first (February 2020-June 2020) and the third (December 2020-June 2021) pandemic waves. We estimated ~ 8% COVID-19 deaths were attributable to pollutant levels above the World Health Organization 2021 air quality guidelines. Discussion: We found suggestive evidence of an association between long-term exposure to ambient air pollutants with mortality among 4 million COVID-19 cases in Italy. https://doi.org/10.1289/EHP11882, Introduction The COVID-19 pandemic is one of the most critical public health crises the world has met in the contemporary age: as of 6 February 2023, >750 million cases and [...]
- Published
- 2023
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